okay, this one is going to sound crazy, but the gift stores (at the parks, our hotel and DTD) have these Mr. Potato Head stations. You can fill a box with as many parts as you want for a fixed price. We didn't buy any, but the kids loved playing with the choices. They have it set up to play, with all the parts being kept in these big columns. There were so many parts to pick from, the kids had a great time making different potato head combos. Many of the parts were Disney-themed, and they would say"remember when we saw this..." and put that part on. The CMs were great, they said it was okay for them to play (it was set up for that). It gave us a break (we traded off-one shopping while one took a break and watched the kids).
My kids also love the interactive water play areas (the one at POP is great because of the cushioned surface). There are campfires at FW, and bike/boat rentals depending on where you stay. I think there is hair braiding at some resorts and maybe face painting?
Having siad that, my girls' favorite non-park activity was still the Wonderland Tea Party!!